Why is my power bank providing fewer charges than expected?

The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker Prime 20,000mAh Power Bank offers an estimated 11000mAh to 14000mAh to power devices.

How can I estimate the number of charges for my device?

To estimate charges, use this formula: (Power Bank Capacity × 0.65) ÷ Device Battery Capacity. For example, an iPhone 15 with a 3,877mAh battery can receive about 3.3 charges from a 20,000mAh power bank (calculated as (20,000mAh × 0.65) ÷ 3,877mAh).

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⚡ Power your hustle anywhere, anytime.

STAY CHARGED STAY MOBILE - Compact 4.9 x 2.1 x 1.9 inch design fits effortlessly in your bag for power on the go.
KNOW YOUR POWER AT A GLANCE - Smart digital display shows battery capacity, input, and output in real time—total control in your hands.
POWER UP AT LIGHTNING SPEED - 200W total output lets you charge two laptops simultaneously at 100W each—no more waiting around.
RAPID RECHARGE IN JUST OVER AN HOUR - 100W USB-C input recharges the power bank fully in only 75 minutes—get back to work faster.
UNIVERSAL COMPATIBILITY ULTIMATE CONVENIENCE - Supports iPhone 14/13, Samsung, MacBook, Dell, and more with 2 USB-C and 1 USB-A port.

The Anker Prime Power Bank packs a massive 20,000mAh battery with an industry-leading 200W output across two USB-C and one USB-A port. Its compact form factor and rapid 100W recharge time make it the ultimate portable charger for professionals on the move. The smart digital display keeps you informed of power status in real time, ensuring you never run out of juice when it matters most.

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是的，所有产品均直接来自美国，英国，阿联酋和印度的授权零售商。我们保持严格的质量控制过程，并在运输前验证每种产品。所有项目都有适用的制造商保证，并由我们的标准退货政策涵盖。

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Product Dimensions	12.7 x 5.46 x 4.98 cm; 539.77 g
Batteries	1 Lithium Metal batteries required. (included)
Item model number	A1336
Special features	Digital Display, Portable
Colour	Golden
Battery Power Rating	20000 Milliamp Hours
Manufacturer	Anker
Item Weight	540 g

Anker Prime Power Bank, 20,000mAh Portable Charger with 200W Output, Smart Digital Display, 2 USB-C and 1 USB-A Port Compatible with iPhone 14/13 Series, Samsung, MacBook, Dell, and More

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